There are special devices used to check the level of hearing loss a person has. These are known as audiometers and are often used at audiology facilities, as well as throat, nose and ear offices. Typically these include embedded hardware that has been attached to headphones. There is also a test button that can be used on most standard computers.

The devices may be used in conjunction with bone vibrators. This is typically the case when it comes to evaluating conductive hearing units. There are both hardware and software meters that can be used, each kind comes in many different models. Meters can connect directly with computers and be operated in a home setting for testing purposes. Still, accuracy of such results is not expected to be as good with at-home versions because of the lack of calibration.

Generally speaking, the clinical devices are known to produce the most accurate of results. These are also more expensive than most traditional software kinds. Often they are employed in professional places, such as research facilities, hospitals, audiology centers and other places in which accuracy and precision of results is the ultimate priority.

The units are mostly used to test the ability of a person to hear. It is important that these are calibrated correctly on a frequent basis to ensure the level that is on a display matches that which is given to the test subject. Proper calibration guarantees measurements that are consistent and correct, regardless of where a test is taken. Furthermore, the results of these tests are important because they are often used to classify the amount and type of loss. Audiometric Calibration Systems and Ear Simulator Systems are usually used to calibrate the devices.

Audiometry, a term derived from the Latin language, is used to refer to the practice of measuring hearing ability. This field is mostly involved with checking the ability of a person to hear at certain levels. Still, there is some science involved that includes tracking one's ability to distinguish between different pitches, sounds and intensities. The machines are known to measure Otoacoustic emissions, as well as acoustic reflex. Test results can be used in diagnosis.

Meters are available for purchase through many retailers. These will come at different prices. Generally, the more accurate and complex the device, the more costly it will be to purchase. These types are usually what is employed in professional places. But there are also at-home kinds available too.

Hearing loss may be caused by numerous things. Loss may be considered partial or total, and permanent or temporary. Usually the amount of hearing loss is best determined by assessing the increase in volume that is needed for the subject to detect the sound. This is an issue of decreased sensitivity to sounds normally heard.

Calibration is the most important thing related to these devices. Many models and makes are available, even versions for use at home. The highest level of accuracy is expected from those used at professional facilities. Still, the right calibration can guarantee accurate and consistent results from nearly any meter. There are many who suffer with loss, which might be total, partial, permanent or temporary.